Type: LanguageService

Describe the bug

• OS and Version: Win10
• VS Code Version: 1.38.0
• C/C++ Extension Version: 0.25.1
• Compiler: GCC

In the snippet below intellisense marks __has_include as error but it compiles without problems

#if __has_include("somefile.h")
#include "somefile.h"  // has constexpr int someVal=1 in it. 
#else
constexpr int someVal = 0;
#endif

Expected behavior
Should not be marked as an error